59 lines
1.6 KiB
C++
59 lines
1.6 KiB
C++
#ifndef _DEBOUNCE_H_
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#define _DEBOUNCE_H_
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enum class RawButtonEvent : uint8_t {
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NoEvent,
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Pressed,
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Released,
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};
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template<uint16_t DEBOUNCE_PRESSED, uint16_t DEBOUNCE_UNPRESSED = DEBOUNCE_PRESSED>
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class Debounce {
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public:
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enum class State : uint8_t {
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Unpressed,
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UnpressedDebounced,
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Pressed,
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PressedDebounced,
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};
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RawButtonEvent event(bool pressed) {
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switch(state) {
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case State::Unpressed :
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if(pressed) {
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state = State::PressedDebounced;
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counter = millis();
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return RawButtonEvent::Pressed;
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}
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break;
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case State::PressedDebounced :
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if((uint16_t) millis() - counter > DEBOUNCE_PRESSED) {
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state = State::Pressed;
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}
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break;
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case State::Pressed :
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if(!pressed) {
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state = State::UnpressedDebounced;
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counter = millis();
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return RawButtonEvent::Released;
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}
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break;
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case State::UnpressedDebounced :
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if((uint16_t) millis() - counter > DEBOUNCE_UNPRESSED) {
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state = State::Unpressed;
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}
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break;
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}
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return RawButtonEvent::NoEvent;
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}
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private:
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State state = State::Unpressed;
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uint16_t counter = 0;
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};
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#endif
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